단단히

1. hard
(an object) Hard enough not to be changed by a certain force.

2. hard; solidly
Evenly solid, not weakly or softly.

3. firmly
Fully and practically.

4. tightly; firmly
Strongly, not loosely.

5. surely; strongly
(one's will or thought maintained) Strongly, without being shaken.

6. seriously; severely
More severely than normal.

7. surely
Done surely.

8. strongly
(the ground for something made) Strongly.